A gauge invariant chiral unitary framework for kaon photo- and electroproduction on the proton

Abstract

We present a gauge invariant approach to photoproduction of mesons on nucleons within a chiral unitary framework. The interaction kernel for meson-baryon scattering is derived from the chiral effective Lagrangian and iterated in a Bethe-Salpeter equation. Within the leading order approximation to the interaction kernel, data on kaon photoproduction from SAPHIR, CLAS and CBELSA/TAPS are analyzed in the threshold region. The importance of gauge invariance and the precision of various approximations in the interaction kernel utilized in earlier works are discussed.

23 pages, 13 figs, EPJ A style

References in corpus (5)

• K^- p scattering length from scattering experiments
• On the Strangeness -1 S-wave Meson-Baryon Scattering
• Measurement of the reaction gamma p --> K0 Sigma+ at photon energies up to 2.6 GeV
• Chiral extrapolations of baryon masses for unquenched three-flavor lattice simulations
• Probing the convergence of perturbative series in baryon chiral perturbation theory

Cited by in corpus (6)

• Aspects of meson-baryon scattering in three- and two-flavor chiral perturbation theory
• Transition form factors of the N*(1535) as a dynamically generated resonance
• Charm and hidden charm scalar mesons in the nuclear medium
• The role of the N*(1535) resonance and the pi^- p --> KY amplitudes in the OZI forbidden pi N --> phi N reaction
• Role of the $N^{\ast }$(1535) in the $J/\psi \to \bar{p}\eta p$ and $J/\psi \to \bar{p}{K}^{+}\Lambda$ reactions
• Radiative decay into $\gamma P$ of the low lying axial-vector mesons